Something

I guess something that mighgta been better is if there was more aliens and possibly a way to kill them a gun or something and a smoother jump on the guy

Great!

I'm not really good in writing reviews, but I really loved your game. And I finished it too, wich is a great point cause most of the time I close the page before ending the games. xD
Congrats, keep the good work!

Super very easy

Tooooooooooo, easy

Glitchy

Controls stick or don't respond and jumping is way too fast, going back to the previous level when you die is way too frustrating, also on some levels the whole screen above where your player is standing flickers up and down a few pixels.

Could be better...

As a lot of people said, this game has a few flaws:
The controls are really annoying. The charecter's jump is too fast and short to play with...
The fact that when you die you have to back up one level is the most frustrating thing in the game. Why can't I just restart the level??!
But beside that the game itself is nice, the storyline is not that original but the gameplay is fun and challenging... Fix some bugs (above) and the game would be better :)